As industries such as third-generation semiconductors, advanced packaging, optical components, and precision ceramics continue to evolve, lapping and polishing processes place ever‑higher demands on machining efficiency, surface quality, and consistency. At the same time, diamond micropowder – a key consumable – is increasingly being developed for dedicated applications and specific processes.
For example, wafer thinning focuses on balancing processing efficiency with surface damage control; dicing places greater emphasis on chipping control and tool life; and high‑precision lapping/polishing prioritizes scratch control, mirror‑finish results, and abrasive self‑sharpening. These differing requirements mean that particle size distribution, crystal morphology, strength, shape, and even agglomerate structure of diamond micropowders must all be optimized for the particular process.
Developing application‑specific diamond micropowders for different processes
In recent years, a growing number of downstream users have begun adopting specialized abrasives for different processes, rather than simply choosing a generic grade of micropowder. For instance, in wafer dicing, it is necessary to balance cutting efficiency, cut quality, and edge chipping control; grinding wheels for thinning require abrasives that offer good cutting ability while maintaining stable self‑sharpening, so as to achieve both efficiency and precision. To meet these application needs, Wanmo Diamond has launched dedicated micropowder products including dicing‑blade grades, thinning‑wheel grades, and DWM wire‑sawing grades. Among them:
Dicing‑blade specialty micropowder balances cutting efficiency and cut quality by optimizing particle characteristics to enhance cutting performance, reduce chipping risk, and extend tool life.
Thinning‑wheel specialty micropowder precisely balances efficiency and accuracy, with optimized cutting performance and self‑sharpening, high purity to avoid process contamination, and improved retention in the bond to match processing requirements.
DWM wire‑sawing specialty micropowder is made from high‑strength raw materials with blocky crystal morphology, narrow particle size distribution, and a high proportion of effective abrasive grains, fully meeting the demands of wire sawing.
Compared with traditional general‑purpose micropowders, these application‑tailored products are more conducive to helping downstream users achieve stable processing and process optimization.
New micropowder structures offer more choices for lapping and polishing
Beyond developing process‑specific products, novel diamond abrasive forms – such as polycrystalline and agglomerated structures – have also attracted increasing attention in recent years. Wanmo Diamond's patented PLM polycrystalline micropowder features a specially designed structure that provides excellent self‑sharpening during use. As the abrasive grains continuously generate new cutting edges, workpiece scratching is reduced, while both machining efficiency and mirror‑finish quality are maintained. This product is suitable for diamond slurries and various lapping/polishing products.
Another product, ABD agglomerated diamond micropowder, consists of microparticles agglomerated into spherical structures, offering full coverage of cutting points. During processing, it continuously forms new micro‑cutting edges, producing virtually no scratches. At the same time, its larger effective particle size and polycrystalline edge structure deliver higher cutting efficiency. Compared with explosion‑synthesized polycrystalline diamond micropowders, ABD serves as an ideal substitute – not only achieving higher surface roughness (Ra) but also overcoming the irregular size distribution typical of explosion‑method polycrystalline diamonds.